The Australia’s foreign intelligence agency, the Australian Signals Directorate (ASD), admitted a hacker has stolen over 30 GB of military documents. Stolen data includes details on fighter jets, military aircraft, and naval ships.

The hacker stole the huge trove of confidential data on military capabilities at an unnamed Department of Defence contractor. The ASD spokesperson Mitchell Clarke, who revealed the incident, confirmed that not “top secret” data was compromised, but data breach included sensitive information not publicly accessible.

The intelligence agency dubbed the hacker “Alf,” after a character in the “Home and Away” Australian TV soap opera.

The stolen files include confidential information, diagrams, and plans and details about the country’s arsenal, such as details on the new F-35 Joint Strike Fighter jet, the Boeing P-8 Poseidon submarine-hunting airplane, Lockheed-Marting C-130 transport aircrafts, JDAM guided bombs, and data on “some naval ships.”